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lvm2/lib/commands/toolcontext.h
David Teigland 88aa285a79 devices: refresh device ids if the system changes
If the system changes, locate PVs that appear on different devices,
and update the device IDs in the devices file.  A system change is
detected by saving the DMI product_uuid or hostname in the devices
file, and comparing it to the current system value.  If a root PV
is restored or copied to a new system with different devices, then
the product_uuid or hostname should change, and trigger lvm to
locate PVIDs from system.devices on new devices.
2023-09-27 15:22:11 -05:00

318 lines
11 KiB
C

/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _LVM_TOOLCONTEXT_H
#define _LVM_TOOLCONTEXT_H
#include "lib/device/dev-cache.h"
#include "lib/device/dev-type.h"
#include "lib/commands/cmd_enum.h"
#include <limits.h>
/*
* Config options that can be changed while commands are processed
*/
struct config_info {
int debug;
int debug_classes;
int verbose;
int silent;
int suppress;
int test;
int yes;
int syslog;
int activation;
int suffix;
int archive; /* should we archive ? */
int backup; /* should we backup ? */
int read_ahead; /* DM_READ_AHEAD_NONE or _AUTO */
int udev_rules;
int udev_sync;
int udev_fallback;
int issue_discards;
uint32_t journal;
const char *msg_prefix;
const char *fmt_name;
const char *dmeventd_executable;
uint64_t unit_factor;
mode_t umask;
char unit_type;
char _padding[1];
};
struct dm_config_tree;
struct profile_params;
struct archive_params;
struct backup_params;
struct arg_values;
struct config_tree_list {
struct dm_list list;
struct dm_config_tree *cft;
};
struct cmd_context_initialized_parts {
unsigned config:1; /* used to reinitialize config if previous init was not successful */
unsigned filters:1;
unsigned connections:1;
};
struct cmd_report {
int log_only;
dm_report_group_type_t report_group_type;
struct dm_report_group *report_group;
struct dm_report *log_rh;
const char *log_name;
log_report_t saved_log_report_state;
};
/* FIXME Split into tool & library contexts */
/* command-instance-related variables needed by library */
struct cmd_context {
/*
* Memory handlers.
*/
struct dm_pool *libmem; /* for permanent config data */
struct dm_pool *mem; /* transient: cleared between each command */
/*
* Command line and arguments.
*/
const char *cmd_line;
const char *name; /* needed before cmd->command is set */
struct command_name *cname;
struct command *command;
int command_enum; /* duplicate from command->command_enum for lib code */
char **argv;
struct arg_values *opt_arg_values;
struct dm_list arg_value_groups;
int opt_count; /* total number of options (beginning with - or --) */
/*
* Position args remaining after command name
* and --options are removed from original argc/argv.
*/
int position_argc;
char **position_argv;
/*
* Format handlers.
*/
const struct format_type *fmt; /* current format to use by default */
struct format_type *fmt_backup; /* format to use for backups */
struct dm_list formats; /* available formats */
struct dm_list segtypes; /* available segment types */
/*
* Machine and system identification.
*/
const char *system_id;
const char *product_uuid;
const char *hostname;
const char *kernel_vsn;
/*
* Device identification.
*/
struct dev_types *dev_types; /* recognized extra device types. */
/*
* Initialization state.
*/
struct cmd_context_initialized_parts initialized;
/*
* Switches.
*/
unsigned is_long_lived:1; /* optimises persistent_filter handling */
unsigned is_interactive:1;
unsigned check_pv_dev_sizes:1;
unsigned handles_missing_pvs:1;
unsigned handles_unknown_segments:1;
unsigned use_linear_target:1;
unsigned partial_activation:1;
unsigned degraded_activation:1;
unsigned auto_set_activation_skip:1;
unsigned si_unit_consistency:1;
unsigned report_strict_type_mode:1;
unsigned report_binary_values_as_numeric:1;
unsigned report_mark_hidden_devices:1;
unsigned metadata_read_only:1;
unsigned threaded:1; /* set if running within a thread e.g. clvmd */
unsigned unknown_system_id:1;
unsigned include_historical_lvs:1; /* also process/report/display historical LVs */
unsigned record_historical_lvs:1; /* record historical LVs */
unsigned include_exported_vgs:1;
unsigned include_foreign_vgs:1; /* report/display cmds can reveal foreign VGs */
unsigned include_shared_vgs:1; /* report/display cmds can reveal lockd VGs */
unsigned include_active_foreign_vgs:1; /* cmd should process foreign VGs with active LVs */
unsigned vg_read_print_access_error:1; /* print access errors from vg_read */
unsigned allow_mixed_block_sizes:1;
unsigned force_access_clustered:1;
unsigned lockd_gl_disable:1;
unsigned lockd_vg_disable:1;
unsigned lockd_lv_disable:1;
unsigned lockd_gl_removed:1;
unsigned lockd_vg_default_sh:1;
unsigned lockd_vg_enforce_sh:1;
unsigned lockd_lv_sh_for_ex:1;
unsigned lockd_global_ex:1; /* set while global lock held ex (lockd) */
unsigned lockf_global_ex:1; /* set while global lock held ex (flock) */
unsigned nolocking:1;
unsigned vg_notify:1;
unsigned lv_notify:1;
unsigned pv_notify:1;
unsigned activate_component:1; /* command activates component LV */
unsigned process_component_lvs:1; /* command processes also component LVs */
unsigned mirror_warn_printed:1; /* command already printed warning about non-monitored mirrors */
unsigned expect_missing_vg_device:1; /* when reading a vg it's expected that a dev for a pv isn't found */
unsigned can_use_one_scan:1;
unsigned is_clvmd:1;
unsigned md_component_detection:1;
unsigned use_full_md_check:1;
unsigned is_activating:1;
unsigned enable_hints:1; /* hints are enabled for cmds in general */
unsigned use_hints:1; /* if hints are enabled this cmd can use them */
unsigned pvscan_recreate_hints:1; /* enable special case hint handling for pvscan --cache */
unsigned scan_lvs:1;
unsigned wipe_outdated_pvs:1;
unsigned enable_devices_list:1; /* command is using --devices option */
unsigned enable_devices_file:1; /* command is using devices file */
unsigned pending_devices_file:1; /* command may create and enable devices file */
unsigned create_edit_devices_file:1; /* command expects to create and/or edit devices file */
unsigned edit_devices_file:1; /* command expects to edit devices file */
unsigned filter_deviceid_skip:1; /* don't use filter-deviceid */
unsigned filter_regex_skip:1; /* don't use filter-regex */
unsigned filter_regex_with_devices_file:1; /* use filter-regex even when devices file is enabled */
unsigned filter_nodata_only:1; /* only use filters that do not require data from the dev */
unsigned run_by_dmeventd:1; /* command is being run by dmeventd */
unsigned sysinit:1; /* --sysinit is used */
unsigned ignorelockingfailure:1; /* --ignorelockingfailure is used */
unsigned check_devs_used:1; /* check devs used by LVs */
unsigned print_device_id_not_found:1; /* print devices file entries not found */
unsigned ignore_device_name_mismatch:1; /* skip updating devices file names */
unsigned backup_disabled:1; /* skip repeated debug message */
unsigned event_activation:1; /* whether event_activation is set */
unsigned udevoutput:1;
unsigned online_vg_file_removed:1;
unsigned disable_dm_devs:1; /* temporarily disable use of dm devs cache */
unsigned filter_regex_set_preferred_name_disable:1; /* prevent dev_set_preferred_name */
unsigned device_ids_check_product_uuid:1;
unsigned device_ids_check_hostname:1;
unsigned device_ids_refresh_trigger:1;
/*
* Devices and filtering.
*/
struct dev_filter *filter;
struct dm_list use_devices; /* struct dev_use for each entry in devices file */
const char *md_component_checks;
const char *search_for_devnames; /* config file setting */
struct dm_list device_ids_check_serial;
const char *devicesfile; /* from --devicesfile option */
struct dm_list deviceslist; /* from --devices option, struct dm_str_list */
struct dm_list *cache_dm_devs; /* cache with UUIDs from DM_DEVICE_LIST (when available) */
/*
* Configuration.
*/
struct dm_list config_files; /* master lvm config + any existing tag configs */
struct profile_params *profile_params; /* profile handling params including loaded profile configs */
struct dm_config_tree *cft; /* the whole cascade: CONFIG_STRING -> CONFIG_PROFILE -> CONFIG_FILE/CONFIG_MERGED_FILES */
struct dm_hash_table *cft_def_hash; /* config definition hash used for validity check (item type + item recognized) */
struct config_info default_settings; /* selected settings with original default/configured value which can be changed during cmd processing */
struct config_info current_settings; /* may contain changed values compared to default_settings */
/*
* Archives and backups.
*/
struct archive_params *archive_params;
struct backup_params *backup_params;
const char *stripe_filler;
/*
* Host tags.
*/
struct dm_list tags; /* list of defined tags */
int hosttags;
/*
* Paths.
*/
const char *lib_dir; /* cache value global/library_dir */
const char *device_id_sysfs_dir;
char system_dir[PATH_MAX];
char dev_dir[PATH_MAX];
char proc_dir[PATH_MAX];
char devices_file_path[PATH_MAX];
/*
* Reporting.
*/
struct cmd_report cmd_report;
/*
* Buffers.
*/
char display_buffer[NAME_LEN * 10]; /* ring buffer for upto 10 longest vg/lv names */
unsigned display_lvname_idx; /* index to ring buffer */
char *linebuffer;
/*
* Others - unsorted.
*/
const char *report_list_item_separator;
const char *time_format;
unsigned rand_seed;
struct dm_list pending_delete; /* list of LVs for removal */
struct dm_pool *pending_delete_mem; /* memory pool for pending deletes */
};
/*
* system_dir may be NULL to use the default value.
* The environment variable LVM_SYSTEM_DIR always takes precedence.
*/
struct cmd_context *create_toolcontext(unsigned is_clvmd,
const char *system_dir,
unsigned set_buffering,
unsigned threaded,
unsigned set_connections,
unsigned set_filters);
void destroy_toolcontext(struct cmd_context *cmd);
int refresh_toolcontext(struct cmd_context *cmd);
int refresh_filters(struct cmd_context *cmd);
int process_profilable_config(struct cmd_context *cmd);
int config_files_changed(struct cmd_context *cmd);
int init_lvmcache_orphans(struct cmd_context *cmd);
int init_filters(struct cmd_context *cmd, unsigned load_persistent_cache);
int init_connections(struct cmd_context *cmd);
int init_run_by_dmeventd(struct cmd_context *cmd);
/*
* A config context is a very light weight cmd struct that
* is only used for reading config settings from lvm.conf,
* which are at cmd->cft.
*/
struct cmd_context *create_config_context(void);
void destroy_config_context(struct cmd_context *cmd);
struct format_type *get_format_by_name(struct cmd_context *cmd, const char *format);
const char *system_id_from_string(struct cmd_context *cmd, const char *str);
#endif